Eliminating use of Apache Karaf CLI client and of ONOS_USE_SSH env. variable.

All CLI access is now through the raw SSH client.
To enable passwordless access, the 'onos-user-key' tool should be used to add user keys.
Added 'onos-user-password' tool in the similar vein and usage as the 'onos-user-key' tool.

Change-Id: Ic5482fc8012369edc818691402ba45d13f130452
diff --git a/tools/test/scenarios/tar-setup.xml b/tools/test/scenarios/tar-setup.xml
index a0b5f47..c6e8201 100644
--- a/tools/test/scenarios/tar-setup.xml
+++ b/tools/test/scenarios/tar-setup.xml
@@ -16,7 +16,7 @@
 <scenario name="tar-setup" description="ONOS cluster setup via onos.tar.gz">
     <group name="Setup-Instances">
         <step name="Push-Bits" exec="onos-push-bits-through-proxy" if="${OCT}"/>
-        <step name="Secure-SSH" exec="onos-secure-ssh -u ${ONOS_WEB_USER} -p ${ONOS_WEB_PASS}" if="${ONOS_USE_SSH}"/>
+        <step name="Secure-SSH" exec="onos-secure-ssh -u ${ONOS_WEB_USER} -p ${ONOS_WEB_PASS}"/>
 
         <parallel var="${OC#}">
             <step name="Push-Bits-${#}" exec="onos-push-bits ${OC#}" unless="${OCT}"/>